The Dataset's Variables and Attributes

Row Type

Variable Name

Attribute Name

Data Type

Value

attribute

NC_GLOBAL

cdm_data_type

String

Grid

attribute

NC_GLOBAL

cmor_version

float

0.96

attribute

NC_GLOBAL

comment

String

GFDL experiment name = CM2.1U_Control-1860_D4. PCMDI experiment name = PIcntrl (run1). Initial conditions for this experiment were derived from a multi-step process. First, an atmosphere + land surface model was spun up with forcing agents at levels representative of the late 20th century. Second, the spun up atmosphere + land surface model was coupled to an ocean + sea ice model. Initial conditions for sea ice, ocean potential temperature and salinity were derived from late 20th century observations. Forcing agents consistent with year 1860 were applied to the coupled model which was integrated for a ~220 year adjustment period. Year 1 of the archived CM2.1U_Control-1860_D4 experiment data begins at the end of this adjustment period. CM2.1U_Control-1860_D4 forcing agents representative of conditions circa-1860 include the well-mixed greenhouse gases (CO2, CH4, N2O), tropospheric and stratospheric O3, tropospheric sulfates, black and organic carbon, dust, sea salt, solar irradiance, and the distribution of land cover types. The direct effect of tropospheric aerosols is calculated by the model, but not the indirect effects.

The data may be used and redistributed for free but is not intendedfor legal use, since it may contain inaccuracies. Neither the dataContributor, ERD, NOAA, nor the United States Government, nor anyof their employees or contractors, makes any warranty, express orimplied, including warranties of merchantability and fitness for aparticular purpose, or assumes any legal liability for the accuracy,completeness, or usefulness, of this information.

attribute

NC_GLOBAL

Northernmost_Northing

double

89.494384765625

attribute

NC_GLOBAL

project_id

String

IPCC Fourth Assessment and US CCSP Projects

attribute

NC_GLOBAL

realization

int

1

attribute

NC_GLOBAL

references

String

The GFDL Data Portal (http://nomads.gfdl.noaa.gov/) provides access to NOAA/GFDL's publicly available model input and output data sets. From this web site one can view and download data sets and documentation, including those related to the GFDL CM2.1 model experiments run for the IPCC's 4th Assessment Report and the US CCSP.

Geophysical Fluid Dynamics Laboratory (GFDL) CM2.1, PIcntr (run1) pre-industrial control experiment output for Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report (AR4) and US Climate Change Science Program (CCSP). GFDL experiment name = CM2.1U_Control-1860_D4. Program for Climate Model Diagnosis and Intercomparison (PCMDI) experiment name = PIcntrl (run1). Initial conditions for this experiment were derived from a multi-step process. First, an atmosphere + land surface model was spun up with forcing agents at levels representative of the late 20th century. Second, the spun up atmosphere + land surface model was coupled to an ocean + sea ice model. Initial conditions for sea ice, ocean potential temperature and salinity were derived from late 20th century observations. Forcing agents consistent with year 1860 were applied to the coupled model which was integrated for a ~220 year adjustment period. Year 1 of the archived CM2.1U_Control-1860_D4 experiment data begins at the end of this adjustment period. CM2.1U_Control-1860_D4 forcing agents representative of conditions circa-1860 include the well-mixed greenhouse gases (CO2, CH4, N2O), tropospheric and stratospheric O3, tropospheric sulfates, black and organic carbon, dust, sea salt, solar irradiance, and the distribution of land cover types. The direct effect of tropospheric aerosols is calculated by the model, but not the indirect effects.